from BZFlag r17264: rewrite StringCopy. wcscpy is not a standard function; we have logic for doing it ourselves already (minus the len = 0 case), so handle len = 0 and do it all ourselves.
from BZFlag r17264: rewrite StringCopy. wcscpy is not a standard function; we have logic for doing it ourselves already (minus the len = 0 case), so handle len = 0 and do it all ourselves.

git-svn-id: 03108f9e8674d800a1076f283f1c09e74d9b8a45@1163 74be908f-6f43-0410-a0eb-e6a2fe4e4ee7

MichaelMarner/FTGL-OSXFix,MichaelMarner/FTGL-OSXFix,MichaelMarner/FTGL-OSXFix